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while loop

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目次

[編集] 構文

while ( cond_expression ) loop_statement

[編集] 説明

cond_expressionは、その結果boolに変換可能な表現でなければならない。それはloop_statementがcond_expressionと評価された場合にのみ実行されtrue、それぞれの実行前に評価されます.
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cond_expression shall be an expression, whose result is convertible to bool. It is evaluated before each execution of loop_statement, which is only executed if the cond_expression evaluates to true.
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ループの実行には、いくつかの時点で終了させる必要がある場合は、<div class="t-tr-text"> ステートメントを破る
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break statement
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If the execution of the loop needs to be terminated at some point,
ステートメントを破る
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break statement
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</div> can be used as terminating statement.
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ループの実行は、ループ本体の最後に続いていますが必要な場合は、<div class="t-tr-text"> ステートメントを続行します
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continue statement
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はショートカットとして使用することができます.
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If the execution of the loop needs to be continued at the end of the loop body,
ステートメントを続行します
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continue statement
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</div> can be used as shortcut.
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[編集] キーワード

while

[編集] 例

#include <iostream>
 
int main()
{
    int i = 0;
    while (i < 10) i++;
 
    std::cout << i << '\n';
 
    int j = 2;
    while (j < 9) {
        std::cout << j << " ";
        j += 2;
    }
}

Output: 

10
2 4 6 8
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